Power press eccentric gear cap



June 20, 1950 vu, GEQRGEFF 2,511,978

"PowER PRESS ECCENTRIC GEAR CAP k 3 Filed Nov. 3, 1947 2 Sheets-Sheet 1 W/ l/ A www!! Imm INVENTOR. VAS/L. GeoRef/CF June 20, 1950 v. GEORGEFF 2,511,973

POWER PRESS ECCENTRIC GEAR CAP Filed Nov. 3, 1947 Sheets-Sheet 2 IN VEN TOR. VQs/z. GQRGEFF 4 TTOP/VE Y In the construction shown, pinion 34 will drive eccentric gear 30 to rotate the eccentric 26 thus reciprocating pitman and its associated slides.

Oil deposited in cup 52 will flow through the opening 54, lubricating eccentric sleeve 48. Oil flowing through opening 58 will lubricate the gear bearing bushing 28. Shaft l is normally held stationary by means of the keys 58 formed in the cap plate 22 secured to the bearing 8.

If the ram adjustment, which governs the lower limit of the throw of the ram actuated by the pitman, becomes deranged or if more than one press blank is accidently placed between the dies associated with the ram and thus permit `metal to metal contact at the bottom of the stroke at the position of greatest thrust, the tremendous stress set up will easily bend the eccentric gear shaft l0, thus freezing it and immobilizing the press. In the prior art, the eccentric formed integrally with its gear 30 has been of unitary form with a suitable journal bearing for the shaft I0. In this construction, when the shaft becomes deformed, it is necessary to completely dismantle the press and to drill and bore the bent shaft Ill from the press in order to enable its removal. This was an expensive and time-consuming task. With the press equipped with my invention, the deformed shaft may be easily removed.

Referring now to Figures 3 and 4, let us asin a convenient manner a bent and deformed eccentric gear shaft.

It will be understood that certain features and sub-combinations are of utility and may be employed without reference to other features and sub-combinations. This is contemplated by and is within the scope of my claims. It is further obvious thatvarious changes may be made in details within the scope of-my claims without departing from the spirit of my invention. It is, therefore, to be understood that my invention is not to be limited to the specific details shown and described.

Having thus described my invention, what I claim is:

1."Al powrpre'ssiincluding in combination a shaft, an eccentric mounted on said shaft for rotation therearound, a pitman adapted to be reciprocated by said eccentric, a unitary gear wheel sume that shaft l0 has been bent as shown in Figure 4, and that the press is immobilized. The bolts 46 which secure the pitman cap 44 to the pitman 42 are unscrewed and the pitman cap removed from the press. The bolts which hold the eccentric gear cap 38 to the eccentric 26 are removed permitting the eccentric cap 38 to be removed. This operation may sometimes be difficult clue to the deformation of the shaft Ill. I provide internally tapped holes 4| for use with jack screws to assist in lifting the eccentric `cap 38 from the eccentric gear. When the cap 38 is removed, the eccentric gear which is associated with the eccentric may then be dropped free of the deformed shaft. The ram adfiustment may be operated to permit the pitman to move downwardly to allow suflicient` clearance to admit dropping the gear.

The bolts 24 holding the cover plate 22 to the stationary lateral bearings 8 are then removed. The threaded openings formerly occupied by the bolts- 24 permit the use of jack screws, enabling the sleeve I2 to be pulled to the right as viewed in Figures 2 and 4. As soon as the sleeve I2 moves suiciently to the right to enter the space 2l), it may be easily removed due to the additional clearance provided thereby. When the sleeve l2 is removed, there is ample clearance to remove the deformed shaft which has been freed from the eccentric by means of my removable eccentric cap and the removal of the bearing bushing `l2 provides clearance through which the deformed shaft may be conveniently removed without the necessity of boring it, and thus permits me to save time and expense.

It will be seen that I have accomplished the objects of my invention. I have provided an eccentric gear cap for power presses which may be readily and conveniently dismantled to permit the removal of a bent shaft without time-consuming boring and burning operations and without destroying additional press parts. I have provided a new and improved power press eccentric gear lcap which will enable me to remove formed integrally with said eccentric adapted to be -driven to rotate said eccentric, said-eccentric being formed with a removable cap, means for releasably securingsaid cap to said eccentric, said pitman having apart surrounding said eccentric `and forming an-eccentric strap, said eccentric strap being `formed with a removable section. means for releasably securing said removable strap section to said pitman,a bearing for said shaft, a removable,` bushing carried by said bearing, means for securing said bushing to said bearing and means for preventing relative rotation between said shaft and said bearing.

2. A- power press4 including in combination a shaft, an eccentric mounted on said shaft for ro- Vtation therearound, a pitman adapted to be reciprocated by saidl eccentric,a gear wheel formed integrally with said eccentric adapted to be driven to rotate said eccentric, said eccentric being formed with a removable cap, means for releasably securing saidvcap `to saideccentric, said pitman having a part surrounding said eccentric and forming an eccentric strap, said eccentric strap being formed ywith a removable section,

Ameans. for releasably securing said removable l strap section to said pitman, a bearing for said shaft, a removable bushing carried by said bearing, means for securing said bushing to said bearing, said bearing being formed with an internal portion of enlarged .cross-sectional area, said bushing being formed with an external portion of reduced cross-sectional area whereby to provide clearance after a predetermined lateral displacement between said bearing and said bushing, the

construction being such that upon removal of said bushing and the removal of said eccentric cap a ideformed shaft' may be readily removed through said bearing.V

3. A power 'press including in combination a shaft,^an eccentric mounted on said shaft for rotation therearound; -a pitman adapted to be reciprocated by said eccentric, a unitary gear wheel formed integrally with said eccentric adapted to be driven to rotate said'feccentric, said eccentric being formed with aremovable cap, means for releasably securing said can to said eccentric, said pitman having apart surrounding said eccentric'v and forming an eccentric strap, said eccentric strap being formed with a removable section.

means for releasably securing said removable 'i strap section to said pitman, a bearing for said shaft, va removable ibushing carried by said bearing, means for securing' said bushingr to said bearing.' said means for securing vsaid bushing to said bearing comprising-a'l plurality of boltsl the said bushing being formed with internally threaded .openings and lconstruction being such that upon removal ofl said bolts jack screws may be inserted into the iiiternally threaded openings to enable the removal of said bushing upon the deformation of said shaft.

VASIL GEORGEFF.

REFERENCES CITED The following references are of record in the Number 6 Name ate Glass May 18, 1909 Fulton July 11, 1911 Dougherty Oct. 15, 1912 Iudd Apr. 21, 1925 Chalman June 23. 1925 Metcalfe Aug. 25, 1925 Garber Nov. 2, 1926 Nemec Dec. 18, 1928 Kimmel Mar. 19, 1929 Kaufman Oct. 17, 1933 Harstick Jan. 9, 1934 Magrueson Apr. 28, 1936 Scott June 22, 1943 Kluppel Jan. 20, 1948 

